Suction roll



Nov. 24, 1931. H. R. FARNswoRTH SUCTION ROLLA Filed July 30, 1928 2Sheets-Sheet .EENS WL i. .NENTOR Z ATTORNEY Nov. 24, 1931. H. R.FARNSWORTH SUCTION ROLL Filed July 50. 1928 2 Sheets-Sheet 2 ATTORNEYPatented Nov. 24, 1931 OFFICE It. FARNSWORTH, F SANDUSKY, OHIO, ASSIGNORTO THE PAPER & TEXTILE ACHINERY COMPANY, 0F SANDUSKY, OHIO SUCTION ROLLApplication led July 30,

The invention to be hereinafter described relates to suction rolls andis intended for use either inthe Fourdrinier or cylinder machine and forany place or position in the machine v where a suction roll may be used.

The main objects of the invention are to A provide a simply and quicklyassembled roll which may be made as economically as possible and, yet.'when assembled, will require least power for operation, while givingfull eiiiciency as a suction roll.

In the rolls of this general type it has been common practice, up to thepresent time to have a suction box or chamber cast for mounting insideth-e shell. Heretofore, this b ox has been specially designed andconstructed. It yhas been, regularly. made as a distinct part or specialfeature of the roll, as a whole. Briefly, standard material, avail- ,oable on the market, could not be used for the suction box. One of themain objects of the present invention is to avoid these objections andprovide a roll in which the box may be quickly. economically, andeiiciently made from, standard material available on the market. Y

In order to more clearly disclose the construction, operation and use ofthe invention. reference should be had to the accom- 80 panyingillustrative drawings forming a Referring to the drawings in detail 1.in

dicates the usual cylindrical suction roll shell of the general typefound in suction-couch or suction-press rolls of practically allFourdrinier paper making machines. The particular method of making` orthe material used in this shell are not of prime importance i928..serial no. 296,198.

in the present invention. This is the finished shell,`ready forassembling. The felt, 'when used in a cylinder machine, or making wire,when used in a F ourdrinier machine, travels on and with this shell andextraction of water from the pulp thereon is effected by suction throughan arc of the shell, all as is well understood. The suction box throughwhich suction 1s applied is mounted withinthe roll and has an opening oropenings communicating w1th the effective arc of the shell. Such, 1ngeneral terms, is the well known suction roll at present widely used.

On the other hand, the only feature of the present invention, which isfound also, in such well known suction roll is the shell.

Instead of the specially7 designed suction box a cylindrical tube 2 isused. Preferably,

this tube is simply a pipe of well known standard type readllyobtainable on the market. -It is cut to the desired length and has anopening, as a slot 3 or perforations or the like made in its uppersurface along that portion through which suction is intended to act uponthe eii'ective arc of the shell. The portion thus cut out, perforated,or provided with openings is defined by the continuous or uncut ends andby radially extending channel bars or plates 4. Preferably, the curvedsurface of the cylindrical box 2 is planed off fiat longitudinally alongthe two parallel lines against which the plates are to be seated. Theseplates have their cooperating faces or edges similarly planed to make anair tight fit of {iat or. plane surfaces. Bars 4 are formed withsuitable channels 5 of U or other well known cross section to receivepacking strips 6 adapted to be seated in the channels to maintain an airtight sliding Contact with theshell. Actually, there is not a physicalcontact between shell and packing, when properly adjusted. The packing,instead, approaches very closely the shell, while a thin film of waterbetween packing and shell, makes an air seal. To securely clamp the barsor channel members 4 in place, screws 7 are provided. They are passedthrough suitable bores at intervals in the channel members 4 landthreaded into perforationsextending through the planed oil portions ofthe suction box. The heads are seated in counter sinks of the respectivebores, and when they are turned in tight the channel members 4 will bedrawn closely into air tight relation with `the suction box, and willlongitudinally define the area of the open or operative part of thesuction box, vthe packing strips 6 at the same time similarly definingthe effective suction area of the shell-assuming the box and shell to beoperatively assembled.

The channel bars are readily obtainable 011 the market either with orwithout the bores for screws. Also, if not quickly available, they maybe readily made, at low cost. The box thus made from simple, inexpensivestandard material is adapted to be mounted concentrically within theshell, as will later appear.

Each end of the tubular box, preferably, though not necessarily, isslightly counter bored, to assure a perfectly cylindrical end bore. Atubular spindle 8 is snugly seated in each bore and provided withreduced extension 9 adapted to pass into a journal, as will laterappear, such extension, at one end, protecting through and beyond suchjournal and being adapted to be coupled to a standard pipe connectionleading to the suction line, in well known manner. Preferably., eachspindle is formed with a radial extending rib or flange 10, and tworadial shoulders 11 and 12, these shoulders being arranged in steppedrelation between the rib 10 and reduced extension 9, Jfor a purpose tobe later disclosed. To assure a positive connection between spindles 8and the respective ends of the suction box 2, screws or the like arepassed through the suction box ends and into the spindle ends; making,practically, a solid unitary structure. The closed portions of thesuction box, at the ends, and in line with the perforated portion, areeach sufficiently machined to snugly receive a correspondingly machinedcasting 13 of usual and well known construction which may bescrew-connected or otherwise suitably secured to the suction box end inthe desired operative position. ln each such casting is mounted theusual screw threaded deckle rod for operating the well known deckles inusual manner. Such construction being well understood needs no furtherdescription.

To properly support the shell on the box, so that it may rotate freelythereabout, an annular head 14 is provided at each end,

,having an outwardly extending radial flange 15 adapted to overlie andengage the correspending end wall of the shell. Each head 14 has,l also,a hand hole 14 through which to reach and operate the deckle rod.Suitable screws clamp these heads in place. Each such head, iscounterbored, inwardly, to provide a seat'for the outer race 16 of anantifriction bearing comprising the said racel7 aieaaeve an inner race17, and rollers 18. The counter bore provides a radial shoulder 19,leaving a rib 2() presenting an opening of substantially the samediameter as the diameter ,of rib 10 which said opening receives.Preferably, the rib 10 is provided with a series of smallcircumferential channels to receive oil or suitable lubricant and, as aras practicable, eliminate possible friction between the contiguoussurfaces. llt will be obvious that the weight of the shell restsdirectly upon the anti-friction bearing which is mounted upon thespindle extendin from the box. To retain the anti-frictionearing inoperative position a sleeve bushing 21 is provided, having a radialflange 22. This bushing is adapted to snugly receive the extension 9 ofspindle 8 and to be seated in the usual and well known standardsectional bearing. When in place, it is adapted to be securely fixed tothe spindle extension 9 by a small set screw or the like 23. Thisprevents the bushing moving longitudinally of the extension, therebypositively maintaining its flange 22 in operative position relatively tothe anti-friction bearing. .The circumferential face of the flange 22is, of course, provided with suitable packing' to present a good runningcontact between 22 and head 14, while at the same time avoiding allpossible friction. Of course, suitable oiling passages are providedthrough flange 22 for supplying lubricant to the adjacent bearing.

When properly assembled, the inner end of bushing 21 will engage thenear face of the inner race 17 which extends very slightly beyond theshoulder 12 of the bearing seat and will lightly clamp that ring againstthe shoulder 11. 0n the other hand, the radial fiange 22 on its innerface, is cut away so that, when so assembled, it will not engage anyother part of the bearing. Likewise, it will be noted that the seatprovided by counter-boring 14 is slightly wider than the outer race 16,leaving a clearance between shoulder 19 and the near 4faceof the racesimilar to the clearance between flange 22 and the opposite face of saidrace 16. Thus, while the inner race will remain stationary with the box,the outer race will be free to rotate on the rollers, with the shell.

The bushings, of course, are simply clamped in the standard sectionalbearings. The suction connections are well known and need not beillustrated or described.

The whole construction is very simple, readily and quickly assembled,inexpensive in construction, and easily and quickly repairable. Theconcentric relation of box and shell gives a strong well balanced andeasy running mounting.

When finally trued up and assembled, the roll is ready to be mounted andused where ever its operation is desired.

The small diameter roll here illustrated is designed for drum roll useon a cylinder machine. The invention is equally applicable in many otherlocations and for other purposes both in cylinder and in Fourdriniermachines, the type shown being merely a single arbitrary selection. Y

lt is thought that the construction, operation and use of the inventionWill be clear from the preceding detailed description wherein only asingle form has been disclosed by Wayof illustration. Changes may bemade in the construction, arrangement and dispo- Y f 'sitlon fmany partsof the'invention without in any Way departing from the field and scopethereof and it is meant to include all such within the presentapplication, wherein only a single. form has been disclosed.

Having thus described my invention, what l claim and desire to` protectby Letters` Patent is 1. In a suctionbox for suction rolls, a tubularmember provided with suction openings and having. longitudinallyextending flatplaned surfaces bordering the area of said openings, andpacking strip members carried bvsaid'tubular member and seated on saidplaned surfaces and circumferentially defining't-he effective area ofsaid box.

2. lna suction box for suction rolls, a tubular member provided withsuction openings and having longitudinallyI extending fiatplanedsurfaces bordering the area of .said openings, packing strip membersprovided box, and bearing between said spindles and the aforesaid shell.

Signed at Sandusky, Ohio, this 26th day of July, 1928.

VHILAND FARNSWORTH.

with surfaces planed to cooperate with the@- l aforesaid surfaces ofsaid tubular member and adapted to circumferentially define the.effective area of said box, and means for securing saidf strips inoperative position with said planed surfaces closely contacting. v

3. In a suction box'for suction rolls, a tubular member provided withsuction openings and having longitudinally extending fiat planedsurfaces bordering the area of said openings, packing strip membersprovided with surfaces planed to cooperate with the aforesaid surfacesof said tubular member and adapted to circumferentially define theeHective area of said box, means for-securing said' strips in operativeposition', and supporting spindles secured in said box ends andprojecting beyond the ends of the afore-l said shell.

4. Asuction roll comprising, a cylindrical shell, a tubular suction boxtherein with suc-'- tion openings and having longitudinally extendingiat-planed surfaces bordering said openings, packing strips carried bysaid tubular member and seated on said planed surfaces andcircuinferentially defining the effective area of said box, tubularspindles carried by the opposite ends of said box, and bearings betweensa'id spindles and the aforesaid shell.

5. A suction roll comprising, a cylindrical shell, a tubular suction boxtherein of subf stantially'uniform cross sectional area from

